In my neck of the woods it's usually right in between both and I've used both, one or the other, for years when changing oil on these vehicles. Mixing the viscosity of oils will not have any effect on the engine. Here is a comparison of 5W-30 vs. I recon most here would use either 5W30 synthetic or a 15W40 mineral and almost nobody would use 0W20. This means that 10W30 oils are better suited for colder temperatures. Mixing 5W-30 and 5W-20: The Verdict. When it comes to 5W-20 or 5W-30 vs 10W-30, the opposite is true: the 5W oils will flow a little better in the cold than a 10W oil for maximum cold-weather protection and easier cold starts. The numbers are just a viscosity rating. . Drivers can get used to one car oil manufacturer because of certain properties. This means that the viscosity will rebalance and will create a new one. The 5w40 motor oil indicates the weight and the viscosity of the engine. Manufacturers designed these oils to protect the engine. 4 qt of 5w20 + 1 qt of 5w30). Can I add 5W30 to 10W40? Yes, you can add 5w30 to 10w40. If you drain the old oil, you are just draining what is in your oil pan; the oil is still left inside your vehicle’s. Answer: Absolutely not. It is safe to mix 5w20 and 5w30 as long as you follow some recommendations. Recently came into a buttload of Delvac syn 10w30 (see below) via a foreclosure sale. It is entirely safe and okay to mix 5W30 and 5W20. And instead of just pouring the different oils into the engine for the engine to mix, it is a lot more fun to play Dr. It also calls for HTO additive. 8,146. Start the engine and run it for a few minutes to mix the oils perfectly while ensuring optimal performance. 25 qts of 0-20 and 2. Today’s multiple viscosity oils work with a wide range of ambient temperatures. I do use add oil to aim the grade to where I want to try. 5w30 and 10w30 engine oils have close viscosity, and thus there is no harm in mixing them. The 5w30 has more viscosity index improvers vs the 10w30 so technically the 10w30 would have more oil that lubricates the engine. Although 5w30 is less dense, their viscosity is similar, and their combination is perfect. The choice between 5W-30 and 10W-30 depends on the specific needs of your engine and the driving conditions you encounter. Joined Oct 23, 2005To mix and homogenize 5W30 and 10W30 properly, firstly pour 5W30 oil into the engine and then add 10W30. This is because 10w40 is slightly thicker when hot, and also rated for. Especially given that you live in Florida, 10W-30 vs 5W-30 is not an issue at all. They have similar ingredients other than the viscosity level. 10w30 is denser as compared to 5w30. What oil Can you mix with 5W-30? These two motor oils are very similar in viscosity; hence, they might mix perfectly in your engine. Note: You can also read Can I Mix 10w30 With 5w30. Hudson, NH. 1-11. Use a high mileage 5w30 in the winter and 10w30 in the summer. It isn’t corrosive, nor will it catch flames or react with each. Michigan. Louis, Mo. Moreover, many of us know that thinner oil is easy to ignite even at a temperature below negative. Now, let's address the question at hand: can you mix 10w30 and 5w30 motor oils? The answer is yes. DS 30-weights are very thin (9. It's good to know that the HTHS of a quality straight 30 is 3. While cold, 10w-30 would be a little thicker. ROCHESTER, NY. I didn't notice until it was two late (Autozone didn't have the oils stocked correctly), but I just mixed two 5w20s with three 10w30s. So, feel free to consolidate all vehicles to a 5w30 or 10w30. To better understand, in a 5W-30 oil, the "W" stands for winter performance. True, there can be different properties between a 5w30 and a 10w30. Engine Wear: At higher temperatures, the 10W-30 oil will be thicker than 5W-20. Have you ever wondered if it’s possible and safe to mix 10w30 and 5w30 engine oil, can you mix 10w30 and 5w30? The shortest answer is yes. 10-25-2013, 06:11 PM. Thicker oil will protect your engine better in extreme temperatures. Yes, you can mix 10w40 to 5w30 if they are on the same brand. Mar 29, 2009. If you mix 2 quarts of 5W20 and 3 of 10W30, it will come pretty close to the viscosity of 5W30 which can ensure a good performance for your engine. S. You should not mix 10w30 and other oil weights. It won't be a problem, though if you are under warranty they might ask for proof of proper oil changes (should something ever happen). Additionally, the two oils have different additives. However, the difference in viscosity between the two can impact engine performance, particularly in specific temperature conditions. Not open for further replies. Yes, I was running 10w30 in November and early december. Severe cold temperatures, 10w30 will suffice as most people have no problems using it in sub-zero temperatures throughout the dreaded winter born-chilling temperatures where snowblowers are usefulIt is not recommended that you mix 5W-30 and 10W-30 oil, given that they are formulated to be more effective at different temperatures. Pouring in 10W30 to an engine that has been running 5W30 is safe and poses no harm. Which oil is better 5w30 or 10w30? 5w30 is less viscous than 10w30. Mixing 0w20 and 5w30 will typically give you a heavy 20-weight or light 30-weight. As oils improved, Chrysler changed their recommendation to a 5W-30 oil for year-round driving. If you want to come up with your own oil mixture, just check the oil number of the two oils. Daily Drives: -2003 Toyota Tacoma PreRunner XtraCab, 2. And from all the research I've done, it appears that from a mechanical engineering standpoint, motor oil viscosity of about 10 or 11 cSt is ideal for the vast majority of automotive engines. If it is running spec oil pressure on 10w30 they stay with 10w30. Yes, you can use 5w20 oil on Toyota instead of 5w30. Mixing 5w30 and 10w30 still yields a 30 wt. Therefore, the 5w40 motor is not thick if it has a high viscosity. 5, so equal parts give a cSt half way in between (8. 9 and 3. #4. damn apartment living. All same viscosity grade for warm operation, 30 weight. I would just use the 10w30. If you search online about mixing oils, you will get a lot of people telling you it is okay. Jan 22, 2016. Can I Use 10w30 Instead of 5w30 in Summer. The act is not recommended, but it is not prohibited also. However, it is advised against because of multiple reasons. Generally, it is recommended to use a multigrade oil like 5W30 or 10W30, which has the ability to flow easily at cold temperatures, yet which can maintain film strength at. Most oils will mix perfectly, provided they have a similar synthetic. 1. Both are the same viscosity at operating temperatures. Right now I have the Castrol 5w20/5w30 mix in during colder weather and I expect that it just makes a thin 5w30 with no additive clash due to the common Castrol-ness. ProjUltraZ]high ambient can lead to higher cylinder head temps and higher oil temps, and 10W-30 generally loses less than 5W-30 (NOACK) see i learned something. This means that the 5w30 motor oil will be much better than the 5w40 motor oil. You'll find most SAE 30's run 11 to 12 cSt @ 100C. One year, I had some 0W30, and I used that. 2L engines are still 5W30. If you need to top up your oil in an emergency, it’s best to stick to oil from the same brand to reduce any potential engine damage. Q. It’s worth noting that using a different oil on your car won’t damage the engine; notwithstanding, it may trigger certain unusual signs depending on your car model. 5w30 oil is thinner than 10w30 oil because of its lower viscosity. Am I going to be alright? Or should I drain and refill? I'm in North Carolina, and the temperatures are pretty cold. The two oils have different viscosities, meaning they flow at different rates. Before making a decision, it is important to know the technical specifications of every oil type. Ford said that at -20F (-28C), conventional 5W-30 took 30 seconds to pump up to the valve train, while conventional 10W-30 needed 2 minutes. 5W20 will flow easier in cold/low temperatures to keep your engine parts. Location: United States. This is because a 10w30 requires less viscosity inhibitors to behave like a 30w at opertating temp compared to a. So is it okay to mix the heavier 10w30 oil with 5w30 oil?As you can see, each of these oils is scientifically formulated. It is possible to combine 5W-30 and 10W-30 engine oil, but it isn’t necessarily the best option. When you’re next able to, completely drain your oil and replace it with. These two oils have contrasting viscosities and are designed for completely different types of use. A lot of car drivers are saying that the act did nothing bad or harmful to their engines. 5. R. I would like to ask you guys to see if I have caused any accidental damage to my engine. If you mix 5w20 and 5w30 engine oils, you won’t be getting the full benefits of either oil. They are both synthetic oils and have nearly the same viscosity. Because the viscosity of 5w30 and 10w30 engine oils is about the same, mixing them is not dangerous. So, 5w30 and 10w30 oil can be mixed without causing any harm, so you can do so. What's strange is that 5W40 is recommended instead of 5W30 or 0W30. Read on to find out more! Quick Answer: Yes, you can put 10w30 in a 5w30 engine, but it may not be the optimal choice. At operating temperatures, both oils will have the same viscosity (30) and will flow and protect identically. Apr 25, 2013 / 5W-30 or 10W-30. It can be used in place of SAE 30 in compatible engines as it provides the same SAE. But, we recommend you not mix or blend 10w30 and 10w40. S. 0L which is a 7. Yes, you can mix oil brands. I'm not one that usually buys an equipment manufacturer's own brand (I don't like the Briggs oil, way over priced) but the Kohler oil I found works best. Jan 7, 2021. The Pennzoil 5W-30 Synthetic Oil can be used for all vehicles with API SN and ILSAC GF-5 specifications. #4. Even if you mix the synthetic and conventional blends of these two oils. #10. Mixing different grades can have adverse effects, disrupting your engine’s performance, so it’s important to stick to the recommended oil grade for your vehicle. But it's not a good idea because different brands have proprietary or special additives. Unless you are experiencing some very cold, and I mean VERY cold temps, 10w30 will work fine. roy1 Discussion starter. The short answer is yes, you can use 10W30 oil instead of 5W30 oil in your lawn mower. Nissan does not recommend these two oils, however you can give them a shot if you want. Engine. and how it doesn't agree with these motors due to very tight clearances. If I were in Vegas or some other location with hot summers, I'd run 10W30 for the added protection during the summer. The two motor oils will stay the same oil. Location. Can You Mix 5w-30 and 10w-30? – Safety Aspects. If the 0w30 motor oil and 10w30 motor oil are heated up, these motor oils will have the same viscosity. Mixing SAE 30 and 10w30 is a terrible idea and might have you counting losses. Mixing the viscosity of oils will not have any effect on the engine. 0W30 has a lower viscosity than other types and will flow more freely in extremely cold weather -22℉ (-30℃) or lower. In the same way, if your mower’s handbook specifies a 5W-30 engine oil, you may use 10W-30 engine oil. Q. Dec 9, 2009. To mix and homogenize 5W30 and 10W30 properly, firstly pour 5W30 oil into the engine and then add 10W30. After doing a lot of reading on this subject for my new-to-me Ram 1500, I decided to bring 5W-30 synthetic oil when I took my truck in to have the oil changed at the dealership who allows me to provide my own oil and filter. Reduced fuel efficiency: Thicker oils can create more resistance in the engine, leading to decreased fuel economy. for my engine spec'd for 5W-30 or 10W-30, shouldn't be an issue right? It's either going to be that or M1 HM 10W-30. These vehicles can be trucks, SUVs, and others. Even when it's 50 degrees out there is very little difference in viscosity between the two, it's only when it's much colder where the 5w30 flows better. Lubrication. A little bit of non diesel oil added as makeup shouldn't make any difference. The Society of Automotive Engineers determines the viscosity ratings of motor oil. I have never ever seen an owners manual that recommendeds. However, remember that you will not have a better performance, and this mixing is not recommended. So, due to viscosity, 5w20 is a thinner oil during operating temperatures, whereas 5w30 is thicker during. Mixing the oils can result in reduced lubrication because they have different viscosities. This means that the viscosity will rebalance and will create a new one. For example, you can mix 5W-30 oil with 10W-30 oil without problems. 5w30 and 10w30 engine oils have close viscosity, and thus there is no harm in mixing them. I'd buy all the 10W-30 I could, after getting the 5W-20. Both 0W20 and 5W20 have almost the same properties when utilized in fair-weather temperatures, so they are technically compatible. Yes, they can be mixed without problem. 7 was due to excessive shear with 5w30s when the engine was introduced. After it is out of warranty it's your call. If you add 5W20 to 5W30, the result is an intermediate viscosity, which may not flow easily as the original oil. High mileage oil works in a lot of cases where seals are the cause of the oil loss. 5W30 oil will flow better at lower temperatures compared to 10W30. Apr 20, 2004. The blending of both oils won’t do the engine any harm, at least not immediately. Meanwhile, the SAE30 sports an average thickness, whereas the 10w30 only tends to get thicker with the temperature flow.